16 x 8,294,400 = 132,710,400 total pixels.
I'm pretty sure you're just a troll, either way the truth is obvious.
1080p screen is 1k and it take 4 x 1080p screen to make 4k.
4k is exactly double the resolution of a 1080p, thus making it 4 1080p monitors, once you square it, since when you multiply the dimensions by x, the area is multiplied by x^2. Similarly, 8k is 2x4k in dimensions, or 4 4k monitors in a grid. 16k, once again, doubles 8k's dimensions, thus it is 4 8k monitors in a grid, or 4x4 4k monitors, or 16 4k monitors.
this is how some TV company was building their early 4k TV. they had 4 x 1920x1080 panels in one panel and called it 4k TV
Also, 16k = 15360 x 8640 = 132710400 = 8294400 x 16 = 4k x 16
So yeah, your point? Linus' setup is 16k, not 64k, your math is wrong.